Zoom lens and imaging apparatus

a technology which is applied in the field of zoom lens and imaging apparatus, can solve the problems of not having not saying to have a sufficiently high magnification, and not saying to suppress a change in various types of aberration

Active Publication Date: 2022-09-27
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a zoom lens that can change various types of aberration during zooming while having a high magnification, but can also be reduced in size and provide good optical performance during zooming. Additionally, an imaging apparatus comprising this zoom lens is also provided.

Problems solved by technology

However, the zoom lens disclosed in JP2014-228808A is not said to have a sufficiently high magnification or is not said to sufficiently suppress a change in various types of aberration in the case of the zooming.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0118]A cross-sectional view of a configuration and a movement trajectory of the zoom lens of Example 1 are illustrated in FIG. 1, and the method and configuration of illustration are described above. Thus, a duplicate description will be partially omitted here. The zoom lens of Example 1 consists of, in order from the object side to the image side, the first lens group G1 having a positive refractive power, the second lens group G2 having a negative refractive power, the aperture stop St, the third lens group G3 having a positive refractive power, the fourth lens group G4 having a negative refractive power, and the fifth lens group G5 having a positive refractive power. In the case of the zooming, all lens groups are moved along the optical axis Z by changing all intervals between the adjacent lens groups. The aperture stop St, the third lens group G3, and the fifth lens group G5 are moved as a single unit in the case of the zooming. The first lens group G1 consists of three lenses...

example 2

[0135]FIG. 4 illustrates across-sectional view of a configuration and a movement trajectory of a zoom lens of Example 2. The zoom lens of Example 2 has the same configuration as the summary of the zoom lens of Example 1. For the zoom lens of Example 2, fundamental lens data is shown in Table 4, specifications and variable surface intervals are shown in Table 5, aspherical coefficients are shown in Table 6, and aberration diagrams are illustrated in FIG. 5.

[0136]

TABLE 4Example 2SnRDNdυdθgFMaterial175.434041.7001.7282528.460.60772S-TIH10.OHARA250.929457.5101.4970081.610.53887FCD1.HOYA3655.045120.150475.296073.7721.6180063.330.54414S-PHM52.OHARA5207.30462DD[5]*635.434651.6001.8062540.910.56920L-LAH53.OHARA*710.888016.9558−65.179960.7101.8515040.780.56958S-LAH89.OHARA9128.936344.0001.8928620.360.63944S-NPH4.OHARA10−24.239400.649*11−18.134110.7001.8540040.380.56890L-LAH85V.OHARA*12−99.70650DD[12]13 (St)∞0.800*1416.558455.1061.5831359.380.54237L-BAL42.OHARA*15−93.399240.1501633.328664.899...

example 3

[0139]FIG. 6 illustrates a cross-sectional view of a configuration and a movement trajectory of a zoom lens of Example 3. The zoom lens of Example 3 has the same configuration as the summary of the zoom lens of Example 1. For the zoom lens of Example 3, fundamental lens data is shown in Table 7, specifications and variable surface intervals are shown in Table 8, aspherical coefficients are shown in Table 9, and aberration diagrams are illustrated in FIG. 7.

[0140]

TABLE 7Example 3SnRDNdυdθgFMaterial174.979771.7001.7282528.460.60772S-TIH10.OHARA250.135337.5101.4970081.610.53887FCD1.HOYA3528.121570.150473.286783.9861.6180063.330.54414S-PHM52.OHARA5224.08849DD[5]*636.138081.6001.8540040.380.56890L-LAH85V.OHARA*711.035006.5008−73.753880.7001.8348142.720.56486S-LAH55V.OHARA945.825394.9651.8080922.760.63073S-NPH1W.OHARA10−22.639810.615*11−18.120730.7001.8540040.380.56890L-LAH85V.OHARA*12−83.11136DD[12]13 (St)∞0.800*1416.444614.4571.5831359.380.54237L-BAL42.OHARA*15−99.998710.5401636.096904....

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Abstract

A zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a fifth lens group in order from an object side. In a case of zooming, an interval with an adjacent lens group is changed. The third lens group includes two positive lenses consecutively arranged in order from a side closest to the object side to an image side. The fifth lens group consists of a negative meniscus lens having a concave surface toward the object side and a positive lens having a convex surface toward the object side in order from the object side to the image side.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2019-149424, filed on Aug. 16, 2019. The above application is hereby expressly incorporated by reference, in its entirety, into the present application.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present disclosure relates to a zoom lens and an imaging apparatus.2. Description of the Related Art[0003]In the related art, for example, a zoom lens having a five-group configuration as disclosed in JP2014-228808A and JP2014-228721A has been known as a lens system applicable to an imaging apparatus such as a digital camera. JP2014-228808A discloses a zoom lens comprising, in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a fifth ...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G02B15/14G02B13/18G02B15/20G02B27/64
CPCG02B15/1451G02B13/18G02B15/145105G02B15/145121G02B15/20G02B27/646G02B15/16G02B15/145129
InventorNODA, TAIGACHO, MICHIO
OwnerFUJIFILM CORP